Dictionary of Ichthyology  

snagging = catching fish by means of unbaited hooks strung on lines. The fish swim into the hooks and are caught on them. Usually illegal. May also refer to inadvertent snagging when sport fishing with a bait or lure, the fish being hooked on some body part outside the mouth. l.

Alaska Department of Fish and Game tag. Photo by Brian W. Coad.

Canadian Museum of Nature